New support for cell reselection of service cells for UE

By allowing UEs to request and receive configuration information for active data sessions during cell reselection, the solution addresses the challenge of maintaining multicast services in the RRC_INACTIVE state, ensuring minimal data loss and preserving power efficiency.

JP2026113592APending Publication Date: 2026-07-07CANON KK
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
CANON KK
Filing Date
2026-04-01
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing wireless communication systems face challenges in maintaining the continuity of multicast/broadcast services for user equipment (UEs) during cell reselection in the RRC_INACTIVE state, particularly due to the lack of configuration information and network communication, leading to potential data loss and service disruption.

Method used

The UE sends a reselection request message to the new serving cell to obtain configuration information for active data sessions, enabling seamless transition to the target base station without requiring a change in RRC state, thus maintaining service continuity.

Benefits of technology

This approach ensures minimal data loss and maintains service continuity for UEs receiving multicast services during cell reselection by providing necessary configuration information, preserving the benefits of the RRC_INACTIVE state such as reduced control plane footprint.

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Abstract

The present invention provides a method, user equipment, program, and medium to support cell reselection for user equipment operating in a disconnected wireless resource control (RRC) state with one or more active data sessions. [Solution] The method by the UE comprises sending a reselection request message to a new serving cell to request cell reselection in order to receive one or more active data sessions from the target base station of the new serving cell; receiving a configuration message containing configuration information associated with the target base station for one or more active data sessions; and configuring the UE to receive data from one or more active data sessions from the target base station in the new serving cell based on the configuration information. An active data session includes one or more multicast broadcast service (MBS) sessions.
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